Code block reordering for retransmissions

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may transmit a hybrid automatic repeat request (HARQ) communication using a first code block order for code blocks of the HARQ communication; detect a trigger to retransmit the HARQ communication based at least in part on transmitting the HARQ communication; reorder the code blocks of the HARQ communication based at least in part on detecting the trigger to retransmit the HARQ communication; and retransmit the HARQ communication using a second code block order based at least in part on reordering the code blocks of the HARQ communication. Numerous other aspects are provided.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Greek Patent Application No.20190100386, filed on Sep. 9, 2019, entitled “CODE BLOCK REORDERING FORRETRANSMISSIONS,” which is hereby expressly incorporated by referenceherein.

TECHNICAL FIELD

Aspects of the technology described below generally relate to wirelesscommunication and to techniques and apparatuses for code blockreordering for retransmissions. Some techniques and apparatusesdescribed herein enable and provide wireless communication devices andsystems configured for hybrid automatic repeat request (HARD) feedback,high reliability communication, and improved average processing gain.

INTRODUCTION

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, and/or the like). Examples of such multiple-accesstechnologies include code division multiple access (CDMA) systems, timedivision multiple access (TDMA) systems, frequency-division multipleaccess (FDMA) systems, orthogonal frequency-division multiple access(OFDMA) systems, single-carrier frequency-division multiple access(SC-FDMA) systems, time division synchronous code division multipleaccess (TD-SCDMA) systems, and Long Term Evolution (LTE).LTE/LTE-Advanced is a set of enhancements to the Universal MobileTelecommunications System (UMTS) mobile standard promulgated by theThird Generation Partnership Project (3GPP).

A wireless communication network may include a number of base stations(BSs) that can support communication for a number of user equipment(UEs). A user equipment (UE) may communicate with a base station (BS)via the downlink and uplink. The downlink (or forward link) refers tothe communication link from the BS to the UE, and the uplink (or reverselink) refers to the communication link from the UE to the BS. A BS maybe referred to as a Node B, a gNB, an access point (AP), a radio head, atransmit receive point (TRP), a new radio (NR) BS, a 5G Node B, and/orthe like.

Multiple access technologies have been adopted in varioustelecommunication standards. Wireless communication standards providecommon protocols to enable different devices (e.g., user equipment) tocommunicate on a municipal, national, regional, and even global level.New radio (NR), which may also be referred to as 5G, is a set ofenhancements to the LTE mobile standard promulgated by the ThirdGeneration Partnership Project (3GPP). As demand for mobile broadbandaccess continues to increase, there exists a need for furtherimprovements in LTE and NR technologies. These improvements can apply toother multiple access technologies and the telecommunication standardsthat employ these technologies.

BRIEF SUMMARY OF SOME EXAMPLES

The following summarizes some aspects of the present disclosure toprovide a basic understanding of the discussed technology. This summaryis not an extensive overview of all contemplated features of thedisclosure, and is intended neither to identify key or critical elementsof all aspects of the disclosure nor to delineate the scope of any orall aspects of the disclosure. The purpose of the summary is to presentsome concepts of one or more aspects of the disclosure in summary formas a prelude to the more detailed description that is presented later.

Devices in a wireless communications network may use feedback messagesto reduce a likelihood of dropped communications and may retransmit thefeedback messages to achieve average processing gain. For example, atransmitter device may transmit a hybrid automatic repeat request (HARQ)communication and periodically retransmit the HARQ communication. TheHARQ communication may increment a processing gain in a receiver deviceby applying chase combining (e.g., transmitting the same data in aplurality of transmissions) or by providing incremental redundancy(e.g., by transmitting different data in a plurality of transmissions).A time invariant impairment may occur for transmissions andretransmissions of HARQ communications.

The time invariant impairment may correspond to a particular timeresource or a particular frequency resource within a slot in which theHARQ communication is transmitted. The time invariant impairment mayrecur at the particular time resource or the particular frequencyresource in subsequent slots that include retransmissions of the HARQcommunication. For example, during transmissions (and retransmissions)of HARQ communications, the time invariant impairment may result indegraded performance of a first subset of code blocks (e.g., for eachtransmission and retransmission of the HARQ communication) relative to asecond subset of code blocks.

Examples of time invariant impairments and other impairments may includespurs, periodic interference, edge effects, residual frequencyimpairment, code block position-based impairment, and/or the like. Aspur may be a frequency component that interferes with a signal as aresult of electromagnetic interference from an electrical component,such as an electrical component of a transmitter device, a receiverdevice, or another device within a proximity of the transmitter deviceor receiver device. In the case of a spur, a set of code blocks thatinclude a common frequency at which the spur occurs may experiencereduced performance as a result of the spur.

As another example, for periodic interference, a set of code blocks thatare disposed at a common time may experience interference from aggressortransmissions (e.g., a periodic channel state information referencesignal (CSI-RS)) of the aggressor transmitter device. In this case, thecommon time may be at a symbol at which a periodic signal of anaggressor transmitter device occurs. As another example, for edgeeffects, code blocks at a frequency edge of a frequency allocation mayexperience reduced performance relative to other code blocks. Thereduced performance may be a result of the frequency allocation beingmisaligned with a physical resource block bundle group (PRG) grid.

As another example, for residual frequency impairment, channelestimation may not reflect a common phase error. This may occur when aset of code blocks are associated with a single demodulation referencesignal (DMRS) without a phase tracking reference signal (PTRS). This mayresult in code blocks at higher symbols having lower performance gainrelative to code blocks at lower symbols. As another example, codeblocks at a first symbol, of a slot, may experience lower signal qualitythan code blocks at subsequent symbols. This may be a result of powerdifferentials between the slot and a last symbol of a previous slot(e.g., for uplink channel). Alternatively, this may be a result ofautomatic gain control (AGC) convergence (e.g., for downlink channels,such as in cellular vehicle-to-everything (CV2X) deployments).Alternatively, this may be a result of an error vector magnitude for afirst symbol after a transition between uplink and downlink or betweendownlink and uplink.

Some aspects described herein improve HARQ processing gain by reorderingcode blocks for different transmissions of a HARQ communication. Forexample, a transmitter device may reorder one or more code blocks of aslot for one or more retransmissions of the HARQ communication to varywhich code blocks of the HARQ communication experience impairments. Inthis way, the transmitter device may increase an average processing gainof a transport block size (TBS) of the HARQ communication. Moreover, thetransmitter device may reduce a likelihood of dropped communications byincreasing the average processing gain and varying the interference orimpairment applied to each code block in each transmission. Further, thetransmitter device may reduce a quantity of retransmissions that areperformed to ensure the HARQ communication is received by the receiverdevice, thereby reducing a utilization of network resources.

In some aspects, a method of wireless communication, performed by atransmitter device, may include transmitting a hybrid automatic repeatrequest (HARQ) communication using a first code block order for codeblocks of the HARQ communication; receiving, from a receiver device,feedback to perform code block reordering; determining to retransmit theHARQ communication based at least in part on the received feedback;reordering the code blocks of the HARQ communication based at least inpart on detecting the trigger to retransmit the HARQ communication; andretransmitting the HARQ communication using a second code block orderbased at least in part on reordering the code blocks of the HARQcommunication.

In some aspects, a transmitter device for wireless communication mayinclude memory and one or more processors operatively coupled to thememory. The memory and the one or more processors may be configured totransmit a hybrid automatic repeat request (HARQ) communication using afirst code block order for code blocks of the HARQ communication;receive, from a receiver device, feedback to perform code blockreordering; determine to retransmit the HARQ communication based atleast in part on the received feedback; reorder the code blocks of theHARQ communication based at least in part on detecting the trigger toretransmit the HARQ communication; and retransmit the HARQ communicationusing a second code block order based at least in part on reordering thecode blocks of the HARQ communication.

In some aspects, a non-transitory computer-readable medium may store oneor more instructions for wireless communication. The one or moreinstructions, when executed by one or more processors of a transmitterdevice, may cause the one or more processors to: transmit a hybridautomatic repeat request (HARQ) communication using a first code blockorder for code blocks of the HARQ communication; receive, from areceiver device, feedback to perform code block reordering; determine toretransmit the HARQ communication based at least in part on the receivedfeedback; reorder the code blocks of the HARQ communication based atleast in part on detecting the trigger to retransmit the HARQcommunication; and retransmit the HARQ communication using a second codeblock order based at least in part on reordering the code blocks of theHARQ communication.

In some aspects, an apparatus for wireless communication may includemeans for transmitting a hybrid automatic repeat request (HARQ)communication using a first code block order for code blocks of the HARQcommunication; means for receiving, from a receiver device, feedback toperform code block reordering; means for determining to retransmit theHARQ communication based at least in part on the received feedback;means for reordering the code blocks of the HARQ communication based atleast in part on detecting the trigger to retransmit the HARQcommunication; and means for retransmitting the HARQ communication usinga second code block order based at least in part on reordering the codeblocks of the HARQ communication.

Aspects generally include a method, apparatus, system, computer programproduct, non-transitory computer-readable medium, user equipment, basestation, wireless communication device, and/or processing system assubstantially described herein with reference to and as illustrated bythe accompanying drawings and specification.

The foregoing has outlined rather broadly the features and technicaladvantages of examples according to the disclosure in order that thedetailed description that follows may be better understood. Additionalfeatures and advantages will be described hereinafter. The conceptionand specific examples disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present disclosure. Such equivalent constructions do notdepart from the scope of the appended claims. Characteristics of theconcepts disclosed herein, both their organization and method ofoperation, together with associated advantages will be better understoodfrom the following description when considered in connection with theaccompanying figures. Each of the figures is provided for the purposesof illustration and description, and not as a definition of the limitsof the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can beunderstood in detail, a more particular description is provided herein,with some aspects of the disclosure being illustrated in the appendeddrawings. However, the appended drawings illustrate only some aspects ofthis disclosure and are therefore not to be considered limiting of thescope of the disclosure. The same reference numbers in differentdrawings may identify the same or similar elements.

FIG. 1 is a block diagram conceptually illustrating an example of awireless communication network, in accordance with various aspects ofthe present disclosure.

FIG. 2 is a block diagram conceptually illustrating an example of a basestation in communication with a UE in a wireless communication network,in accordance with various aspects of the present disclosure.

FIG. 3A is a block diagram conceptually illustrating an example of aframe structure in a wireless communication network, in accordance withvarious aspects of the present disclosure.

FIG. 3B is a block diagram conceptually illustrating an examplesynchronization communication hierarchy in a wireless communicationnetwork, in accordance with various aspects of the present disclosure.

FIG. 4 is a block diagram conceptually illustrating an example slotformat with a normal cyclic prefix, in accordance with various aspectsof the present disclosure.

FIG. 5 illustrates an example logical architecture of a distributedradio access network (RAN), in accordance with various aspects of thepresent disclosure.

FIG. 6 illustrates an example physical architecture of a distributedRAN, in accordance with various aspects of the present disclosure.

FIG. 7 is a diagram illustrating an example of code block reordering forretransmissions, in accordance with various aspects of the presentdisclosure.

FIG. 8 is a diagram illustrating an example process performed, forexample, by a transmitter device, in accordance with various aspects ofthe present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and should not be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. Based at least inpart on the teachings herein one skilled in the art should appreciatethat the scope of the disclosure is intended to cover any aspect of thedisclosure disclosed herein, whether implemented independently of orcombined with any other aspect of the disclosure. For example, anapparatus may be implemented or a method may be practiced using anynumber of the aspects set forth herein. In addition, the scope of thedisclosure is intended to cover such an apparatus or method which ispracticed using other structure, functionality, or structure andfunctionality in addition to or other than the various aspects of thedisclosure set forth herein. It should be understood that any aspect ofthe disclosure disclosed herein may be embodied by one or more elementsof a claim.

Several aspects of telecommunication systems will now be presented withreference to various apparatuses and techniques. These apparatuses andtechniques will be described in the following detailed description andillustrated in the accompanying drawings by various blocks, modules,components, circuits, steps, processes, algorithms, and/or the like(collectively referred to as “elements” or “features”). These elementsmay be implemented using hardware, software, or combinations thereof.Whether such elements are implemented as hardware or software dependsupon the particular application and design constraints imposed on theoverall system.

While some aspects may be described herein using terminology commonlyassociated with 3G and/or 4G wireless technologies, aspects of thepresent disclosure can be applied in other generation-basedcommunication systems, such as 5G and later, including NR technologies.

While aspects and embodiments are described in this application byillustration to some examples, those skilled in the art will understandthat additional implementations and use cases may come about in manydifferent arrangements and scenarios. Innovations described herein maybe implemented across many differing platform types, devices, systems,shapes, sizes, packaging arrangements. For example, embodiments and/oruses may come about via integrated chip embodiments and/or othernon-module-component based devices (e.g., end-user devices, vehicles,communication devices, computing devices, industrial equipment,retail/purchasing devices, medical devices, AI-enabled devices, and/orthe like). While some examples may or may not be specifically directedto use cases or applications, a wide assortment of applicability ofdescribed innovations may occur. Implementations may range a spectrumfrom chip-level or modular components to non-modular, non-chip-levelimplementations and further to aggregate, distributed, or OEM devices orsystems incorporating one or more aspects of the described innovations.In some practical settings, devices incorporating described aspects andfeatures may also necessarily include additional components and featuresfor implementation and practice of claimed and described embodiments.For example, transmission and reception of wireless signals necessarilyincludes a number of components for analog and digital purposes (e.g.,hardware components including one or more antennas, RF-chains, poweramplifiers, modulators, buffers, processors, interleavers,adders/summers, and/or the like). It is intended that innovationsdescribed herein may be practiced in a wide variety of devices,chip-level components, systems, distributed arrangements, end-userdevices, etc. of varying sizes, shapes, and constitution.

FIG. 1 is a diagram illustrating a wireless network 100 in which aspectsof the present disclosure may be practiced. The wireless network 100 maybe an LTE network or some other wireless network, such as a 5G or NRnetwork. The wireless network 100 may include a number of BSs 110 (shownas BS 110 a, BS 110 b, BS 110 c, and BS 110 d) and other networkentities. ABS is an entity that communicates with user equipment (UEs)and may also be referred to as a base station, a NR BS, a Node B, a gNB,a 5G node B (NB), an access point, a transmit receive point (TRP),and/or the like. Each BS may provide communication coverage for aparticular area (e.g., a fixed or changing geographical area). In somescenarios, BSs 110 may be stationary or non-stationary. In somenon-stationary scenarios, mobile BSs 110 may move with varying speeds,direction, and/or heights. In 3GPP, the term “cell” can refer to acoverage area of a BS 110 and/or a BS subsystem serving this coveragearea, depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, afemto cell, and/or another type of cell. A macro cell may cover arelatively large geographic area (e.g., several kilometers in radius)and may allow unrestricted access by UEs with service subscription.Additionally, or alternatively, a BS may support access to an unlicensedRF band (e.g., a Wi-Fi band and/or the like). A pico cell may cover arelatively small geographic area and may allow unrestricted access byUEs with service subscription. A femto cell may cover a relatively smallgeographic area (e.g., a home) and may allow restricted access by UEshaving association with the femto cell (e.g., UEs in a closed subscribergroup (CSG)). ABS for a macro cell may be referred to as a macro BS. ABS for a pico cell may be referred to as a pico BS. A BS for a femtocell may be referred to as a femto BS or a home BS. In the example shownin FIG. 1, a BS 110 a may be a macro BS for a macro cell 102 a, a BS 110b may be a pico BS for a pico cell 102 b, and a BS 110 c may be a femtoBS for a femto cell 102 c. A BS may support one or multiple (e.g.,three) cells. The terms “eNB”, “base station”, “NR BS”, “gNB”, “TRP”,“AP”, “node B”, “5G NB”, and “cell” may be used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and thegeographic area of the cell may move according to the location of amobile BS. In some aspects, the BSs may be interconnected to one anotherand/or to one or more other BSs or network nodes (not shown) in thewireless network 100 through various types of backhaul interfaces suchas a direct physical connection, a virtual network, and/or the likeusing any suitable transport network. In other scenarios, BSs may beimplemented in a software defined network (SDN) manner or via networkfunction virtualization (NFV) manner.

Wireless network 100 may also include relay stations. A relay station isan entity that can receive a transmission of data from an upstreamstation (e.g., a BS or a UE) and send a transmission of the data to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that can relay transmissions for other UEs. In the example shown inFIG. 1, a relay station 110 d may communicate with macro BS 110 a and aUE 120 d in order to facilitate communication between BS 110 a and UE120 d. A relay station may also be referred to as a relay BS, a relaybase station, a relay, and/or the like.

Wireless network 100 may be a heterogeneous network that includes BSs ofdifferent types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/orthe like. These different types of BSs may have different transmit powerlevels, different coverage areas, and different impacts on interferencein wireless network 100. For example, macro BSs may have a high transmitpower level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relayBSs may have lower transmit power levels (e.g., 0.1 to 2 Watts).

A network controller 130 may couple to a set of BSs and may providecoordination and control for these BSs. Network controller 130 maycommunicate with the BSs via a backhaul. The BSs may also communicatewith one another, e.g., directly or indirectly via a wireless orwireline backhaul.

UEs 120 (e.g., 120 a, 120 b, 120 c, 120 d, 120 e) may be dispersedthroughout wireless network 100, and each UE may be stationary ormobile. A UE may also be referred to as an access terminal, a terminal,a mobile station, a subscriber unit, a station, and/or the like. A UEmay be a cellular phone (e.g., a smart phone), a personal digitalassistant (PDA), a wireless modem, a wireless communication device, ahandheld device, a laptop computer, a cordless phone, a wireless localloop (WLL) station, a tablet, a camera, a gaming device, a netbook, asmartbook, an ultrabook, a medical device or equipment, biometricsensors/devices, wearable devices (smart watches, smart clothing, smartglasses, smart wrist bands, smart jewelry (e.g., smart ring, smartbracelet)), an entertainment device (e.g., a music or video device, or asatellite radio), a vehicular component or sensor, smart meters/sensors,industrial manufacturing equipment, robotics, drones, implantabledevices, augmented reality devices, a global positioning system device,or any other suitable device that is configured to communicate via awireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolvedor enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEsinclude, for example, robots, drones, remote devices, sensors, meters,monitors, location tags, and/or the like, that may communicate with abase station, another device (e.g., remote device), or some otherentity. A wireless node may provide, for example, connectivity for or toa network (e.g., a wide area network such as Internet or a cellularnetwork) via a wired or wireless communication link. Some UEs may beconsidered Internet-of-Things (IoT) devices, and/or may be implementedas may be implemented as NB-IoT (narrowband internet of things) devices.Some UEs may be considered a Customer Premises Equipment (CPE). UE 120may be included inside a housing that houses components of UE 120, suchas processor components, memory components, and/or the like. Thesecomponents may be integrated in a variety of combinations and/or may bestand-alone, distributed components considering design constraintsand/or operational preferences.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular RAT andmay operate on one or more frequencies. A RAT may also be referred to asa radio technology, an air interface, and/or the like. A frequency mayalso be referred to as a carrier, a frequency channel, and/or the like.Each frequency may support a single RAT in a given geographic area inorder to avoid interference between wireless networks of different RATs.In some cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120 a and UE 120e) may communicate directly using one or more sidelink channels (e.g.,without using a base station 110 as an intermediary to communicate withone another). For example, the UEs 120 may communicate usingpeer-to-peer (P2P) communications, device-to-device (D2D)communications, a vehicle-to-everything (V2X) protocol (e.g., which mayinclude a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure(V2I) protocol, and/or the like), a mesh network, and/or the like. Inthis case, the UE 120 may perform scheduling operations, resourceselection operations, and/or other operations described elsewhere hereinas being performed by the base station 110. A UE performing schedulingoperations can include or perform base-station-like functions in thesedeployment scenarios.

As indicated above, FIG. 1 is provided merely as an example. Otherexamples may differ from what is described with regard to FIG. 1.

FIG. 2 shows a block diagram of a design 200 of base station 110 and UE120, which may be one of the base stations and one of the UEs in FIG. 1.Base station 110 may be equipped with T antennas 234 a through 234 t,and UE 120 may be equipped with R antennas 252 a through 252 r, where ingeneral T≥1 and R≥1. The T and R antennas may be configured withmultiple antenna elements formed in an array for MIMO or massive MIMOdeployments that can occur in millimeter wave (mmWave or mmW)communication systems.

At base station 110, a transmit processor 220 can carry out a number offunctions associated with communications. For example, transmitprocessor 220 may receive data from a data source 212 for one or moreUEs, select one or more modulation and coding schemes (MCS) for each UEbased at least in part on channel quality indicators (CQIs) receivedfrom the UE, process (e.g., encode and modulate) the data for each UEbased at least in part on the MCS(s) selected for the UE, and providedata symbols for all UEs. Transmit processor 220 may also process systeminformation (e.g., for semi-static resource partitioning information(SRPI) and/or the like) and control information (e.g., CQI requests,grants, upper layer signaling, and/or the like) and provide overheadsymbols and control symbols. Transmit processor 220 may also generatereference symbols for reference signals (e.g., the cell-specificreference signal (CRS)) and synchronization signals (e.g., the primarysynchronization signal (PSS) and secondary synchronization signal(SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor230 may perform spatial processing (e.g., precoding) on the datasymbols, the control symbols, the overhead symbols, and/or the referencesymbols, if applicable, and may provide T output symbol streams to Tmodulators (MODs) 232 a through 232 t. Each modulator 232 may process arespective output symbol stream (e.g., for OFDM and/or the like) toobtain an output sample stream. Each modulator 232 may further process(e.g., convert to analog, amplify, filter, and upconvert) the outputsample stream to obtain a downlink signal. T downlink signals frommodulators 232 a through 232 t may be transmitted via T antennas 234 athrough 234 t, respectively. According to various aspects described inmore detail below, the synchronization signals can be generated withlocation encoding to convey additional information.

At UE 120, antennas 252 a through 252 r may receive downlink RF signals.The downlink RF signals may be received from and/or may be transmittedby one or more base stations 110. The signals can be provided todemodulators (DEMODs) 254 a through 254 r, respectively. Eachdemodulator 254 may condition (e.g., filter, amplify, downconvert, anddigitize) a received signal to obtain input samples. Each demodulator254 may further process the input samples (e.g., for OFDM and/or thelike) to obtain received symbols. A MIMO detector 256 may obtainreceived symbols from all R demodulators 254 a through 254 r, performMIMO detection on the received symbols if applicable, and providedetected symbols. A receive processor 258 may process (e.g., demodulateand decode) the detected symbols, provide decoded data for UE 120 to adata sink 260, and provide decoded control information and systeminformation to a controller/processor 280. A channel processor maydetermine reference signal received power (RSRP), received signalstrength indicator (RSSI), reference signal received quality (RSRQ),channel quality indicator (CQI), and/or the like. In some aspects, oneor more components of UE 120 may be included in a housing.

For uplink communications, a UE 120 may transmit control informationand/or data to another device, such as one or more base stations 110.For example, at UE 120, a transmit processor 264 may receive and processdata from a data source 262 and control information (e.g., for reportscomprising RSRP, RSSI, RSRQ, CQI, and/or the like) fromcontroller/processor 280. Transmit processor 264 may also generatereference symbols for one or more reference signals. The symbols fromtransmit processor 264 may be precoded by a TX MIMO processor 266 ifapplicable, further processed by modulators 254 a through 254 r (e.g.,for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to basestation 110. At base station 110, the uplink signals from UE 120 andother UEs may be received by antennas 234, processed by demodulators232, detected by a MIMO detector 236 if applicable, and furtherprocessed by a receive processor 238 to obtain decoded data and controlinformation sent by UE 120. Receive processor 238 may provide thedecoded data to a data sink 239 and the decoded control information tocontroller/processor 240. Base station 110 may include communicationunit 244 and communicate to network controller 130 via communicationunit 244. Network controller 130 may include communication unit 294,controller/processor 290, and memory 292.

Controller/processor 240 of base station 110, controller/processor 280of UE 120, and/or any other component(s) of FIG. 2 may perform one ormore techniques associated with code block reordering forretransmissions, as described in more detail elsewhere herein. Forexample, controller/processor 240 of base station 110,controller/processor 280 of UE 120, and/or any other component(s) ofFIG. 2 may perform or direct operations of, for example, process 800 ofFIG. 8 and/or other processes as described herein. Memories 242 and 282may store data and program codes for base station 110 and UE 120,respectively. A scheduler 246 may schedule UEs for data transmission onthe downlink and/or uplink.

In some aspects, a transmitter device (e.g., the UE 120 or the BS 110)may include a variety of means or components for implementingcommunication functions. For example, the variety of means may includemeans for transmitting a hybrid automatic repeat request (HARQ)communication using a first code block order for code blocks of the HARQcommunication, means for detecting a trigger to retransmit the HARQcommunication based at least in part on transmitting the HARQcommunication, means for reordering the code blocks of the HARQcommunication based at least in part on detecting the trigger toretransmit the HARQ communication, means for retransmitting the HARQcommunication using a second code block order based at least in part onreordering the code blocks of the HARQ communication, and/or the like.

In some aspects, the UE 120 may include a variety of structuralcomponents for carrying out functions of the various means. For example,structural components that carry out functions of such means may includeone or more components of UE 120 described in connection with FIG. 2,such as antenna 252, DEMOD 254, MOD 254, MIMO detector 256, receiveprocessor 258, transmit processor 264, TX MIMO processor 266,controller/processor 280, and/or the like.

In some aspects, the base station 110 may include a variety ofstructural components for carrying out functions of the various means.For example, structural components that carry out functions of suchmeans may include one or more components of base station 110 describedin connection with FIG. 2, such as transmit processor 220, TX MIMOprocessor 230, DEMOD 232, MOD 232, antenna 234, MIMO detector 236,receive processor 238, controller/processor 240, and/or the like.

As indicated above, FIG. 2 is provided merely as an example. Otherexamples may differ from what is described with regard to FIG. 2.

FIG. 3A shows an example frame structure 300 for FDD in atelecommunications system (e.g., NR). The transmission timeline for eachof the downlink and uplink may be partitioned into units of radio frames(sometimes referred to as frames). Each radio frame may have apredetermined duration (e.g., 10 milliseconds (ms)) and may bepartitioned into a set of Z (Z≥1) subframes (e.g., with indices of 0through Z−1). Each subframe may have a predetermined duration (e.g.,lms) and may include a set of slots (e.g., 2^(m) slots per subframe areshown in FIG. 3A, where m is a numerology used for a transmission, suchas 0, 1, 2, 3, 4, and/or the like). Each slot may include a set of Lsymbol periods. For example, each slot may include fourteen symbolperiods (e.g., as shown in FIG. 3A), seven symbol periods, or anothernumber of symbol periods. In a case where the subframe includes twoslots (e.g., when m=1), the subframe may include 2L symbol periods,where the 2L symbol periods in each subframe may be assigned indices of0 through 2L−1. In some aspects, a scheduling unit for the FDD mayframe-based, subframe-based, slot-based, symbol-based, and/or the like.

While some techniques are described herein in connection with frames,subframes, slots, and/or the like, these techniques may equally apply toother types of wireless communication structures, which may be referredto using terms other than “frame,” “subframe,” “slot,” and/or the likein 5G NR. In some aspects, a wireless communication structure may referto a periodic time-bounded communication unit defined by a wirelesscommunication standard and/or protocol. Additionally, or alternatively,different configurations of wireless communication structures than thoseshown in FIG. 3A may be used.

In certain telecommunications (e.g., NR), a base station may transmitsynchronization signals. For example, a base station may transmit aprimary synchronization signal (PSS), a secondary synchronization signal(SSS), and/or the like, on the downlink for each cell supported by thebase station. The PSS and SSS may be used by UEs for cell search andacquisition. For example, the PSS may be used by UEs to determine symboltiming, and the SSS may be used by UEs to determine a physical cellidentifier, associated with the base station, and frame timing. The basestation may also transmit a physical broadcast channel (PBCH). The PBCHmay carry some system information, such as system information thatsupports initial access by UEs.

In some aspects, the base station may transmit the PSS, the SSS, and/orthe PBCH in accordance with a synchronization communication hierarchy(e.g., a synchronization signal (SS) hierarchy) including multiplesynchronization communications (e.g., SS blocks), as described below inconnection with FIG. 3B.

FIG. 3B is a block diagram conceptually illustrating an example SShierarchy, which is an example of a synchronization communicationhierarchy. As shown in FIG. 3B, the SS hierarchy may include an SS burstset, which may include a plurality of SS bursts (identified as SS burst0 through SS burst B−1, where B is a maximum number of repetitions ofthe SS burst that may be transmitted by the base station). As furthershown, each SS burst may include one or more SS blocks (identified as SSblock 0 through SS block (b_(max_SS)−1), where b_(max_SS)−1 is a maximumnumber of SS blocks that can be carried by an SS burst). In someaspects, different SS blocks may be beam-formed differently. An SS burstset may be periodically transmitted by a wireless node, such as every Xmilliseconds, as shown in FIG. 3B. In some aspects, an SS burst set mayhave a fixed or dynamic length, shown as Y milliseconds in FIG. 3B.

The SS burst set shown in FIG. 3B is an example of a synchronizationcommunication set, and other synchronization communication sets may beused in connection with the techniques described herein. Furthermore,the SS block shown in FIG. 3B is an example of a synchronizationcommunication, and other synchronization communications may be used inconnection with the techniques described herein.

In some aspects, an SS block includes resources that carry the PSS, theSSS, the PBCH, and/or other synchronization signals (e.g., a tertiarysynchronization signal (TSS)) and/or synchronization channels. In someaspects, multiple SS blocks are included in an SS burst, and the PSS,the SSS, and/or the PBCH may be the same across each SS block of the SSburst. In some aspects, a single SS block may be included in an SSburst. In some aspects, the SS block may be at least four symbol periodsin length, where each symbol carries one or more of the PSS (e.g.,occupying one symbol), the SSS (e.g., occupying one symbol), and/or thePBCH (e.g., occupying two symbols).

In some aspects, the symbols of an SS block are consecutive, as shown inFIG. 3B. In some aspects, the symbols of an SS block arenon-consecutive. Similarly, in some aspects, one or more SS blocks ofthe SS burst may be transmitted in consecutive radio resources (e.g.,consecutive symbol periods) during one or more slots. Additionally, oralternatively, one or more SS blocks of the SS burst may be transmittedin non-consecutive radio resources.

In some aspects, the SS bursts may have a burst period, whereby the SSblocks of the SS burst are transmitted by the base station according tothe burst period. In other words, the SS blocks may be repeated duringeach SS burst. In some aspects, the SS burst set may have a burst setperiodicity, whereby the SS bursts of the SS burst set are transmittedby the base station according to the fixed burst set periodicity. Inother words, the SS bursts may be repeated during each SS burst set.

The base station may transmit system information, such as systeminformation blocks (SIBs) on a physical downlink shared channel (PDSCH)in certain slots. The base station may transmit control information/dataon a physical downlink control channel (PDCCH) in C symbol periods of aslot, where B may be configurable for each slot. The base station maytransmit traffic data and/or other data on the PDSCH in the remainingsymbol periods of each slot.

As indicated above, FIGS. 3A and 3B are provided as examples. Otherexamples may differ from what is described with regard to FIGS. 3A and3B.

FIG. 4 shows an example slot format 410 with a normal cyclic prefix. Theavailable time frequency resources may be partitioned into resourceblocks. Each resource block may cover a set to of subcarriers (e.g., 12subcarriers) in one slot and may include a number of resource elements.Each resource element may cover one subcarrier in one symbol period(e.g., in time) and may be used to send one modulation symbol, which maybe a real or complex value.

An interlace structure may be used for each of the downlink and uplinkfor FDD in certain telecommunications systems (e.g., NR). For example, Qinterlaces with indices of 0 through Q−1 may be defined, where Q may beequal to 4, 6, 8, 10, or some other value. Each interlace may includeslots that are spaced apart by Q frames. In particular, interlace q mayinclude slots q, q+Q, q+2Q, etc., where q ∈{0, . . . , Q−1}.

A UE may be located within the coverage of multiple BSs. One of theseBSs may be selected to serve the UE. The serving BS may be selectedbased at least in part on various criteria such as received signalstrength, received signal quality, path loss, and/or the like. Receivedsignal quality may be quantified by a signal-to-noise-and-interferenceratio (SINR), or a reference signal received quality (RSRQ), or someother metric. The UE may operate in a dominant interference scenario inwhich the UE may observe high interference from one or more interferingBSs.

While aspects of the examples described herein may be associated with NRor 5G technologies, aspects of the present disclosure may be applicablewith other wireless communication systems. New radio (NR) may refer toradios configured to operate according to a new air interface (e.g.,other than Orthogonal Frequency Divisional Multiple Access (OFDMA)-basedair interfaces) or fixed transport layer (e.g., other than InternetProtocol (IP)). In aspects, NR may utilize OFDM with a CP (hereinreferred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on theuplink, may utilize CP-OFDM on the downlink and include support forhalf-duplex operation using TDD. In aspects, NR may, for example,utilize OFDM with a CP (herein referred to as CP-OFDM) and/or discreteFourier transform spread orthogonal frequency-division multiplexing(DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink andinclude support for half-duplex operation using TDD. NR may includeEnhanced Mobile Broadband (eMBB) service targeting wide bandwidth (e.g.,80 megahertz (MHz) and beyond), millimeter wave (mmW) targeting highcarrier frequency (e.g., 60 gigahertz (GHz)), massive MTC (mMTC)targeting non-backward compatible MTC techniques, and/or missioncritical targeting ultra reliable low latency communications (URLLC)service.

In some aspects, a single component carrier bandwidth of 100 MHz may besupported. NR resource blocks may span 12 sub-carriers with asub-carrier bandwidth of 60 or 120 kilohertz (kHz) over a 0.1millisecond (ms) duration. Each radio frame may include 40 slots and mayhave a length of 10 ms. Consequently, each slot may have a length of0.25 ms. Each slot may indicate a link direction (e.g., DL or UL) fordata transmission and the link direction for each slot may bedynamically switched. Each slot may include DL/UL data as well as DL/ULcontrol data.

Beamforming may be supported and beam direction may be dynamicallyconfigured. MIMO transmissions with precoding may also be supported.MIMO configurations in the DL may support up to 8 transmit antennas withmulti-layer DL transmissions up to 8 streams and up to 2 streams per UE.Multi-layer transmissions with up to 2 streams per UE may be supported.Aggregation of multiple cells may be supported with up to 8 servingcells. Alternatively, NR may support a different air interface, otherthan an OFDM-based interface. NR networks may include entities suchcentral units or distributed units.

As indicated above, FIG. 4 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 4.

FIG. 5 illustrates an example logical architecture of a distributed RAN500, according to aspects of the present disclosure. A 5G access node506 may include an access node controller (ANC) 502. The ANC may be acentral unit (CU) of the distributed RAN 500. The backhaul interface tothe next generation core network (NG-CN) 504 may terminate at the ANC.The backhaul interface to neighboring next generation access nodes(NG-ANs) may terminate at the ANC. The ANC may include one or more TRPs508 (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs,gNB, or some other term). As described above, a TRP may be usedinterchangeably with “cell.”

The TRPs 508 may be a distributed unit (DU). The TRPs may be connectedto one ANC (ANC 502) or more than one ANC (not illustrated). Forexample, for RAN sharing, radio as a service (RaaS), and servicespecific AND deployments, the TRP may be connected to more than one ANC.A TRP may include one or more antenna ports. The TRPs may be configuredto individually (e.g., dynamic selection) or jointly (e.g., jointtransmission) serve traffic to a UE.

The local architecture of RAN 500 may be used to illustrate fronthauldefinition. The architecture may be defined that support fronthaulingsolutions across different deployment types. For example, thearchitecture may be based at least in part on transmit networkcapabilities (e.g., bandwidth, latency, and/or jitter).

The architecture may share features and/or components with LTE.According to aspects, the next generation AN (NG-AN) 510 may supportdual connectivity with NR. The NG-AN may share a common fronthaul forLTE and NR.

The architecture may enable cooperation between and among TRPs 508. Forexample, cooperation may be preset within a TRP and/or across TRPs viathe ANC 502. According to aspects, no inter-TRP interface may beneeded/present.

According to aspects, a dynamic configuration of split logical functionsmay be present within the architecture of RAN 500. The packet dataconvergence protocol (PDCP), radio link control (RLC), medium accesscontrol (MAC) protocol may be adaptably placed at the ANC or TRP.

According to various aspects, a BS may include a central unit (CU)(e.g., ANC 502) and/or one or more distributed units (e.g., one or moreTRPs 508).

As indicated above, FIG. 5 is provided merely as an example. Otherexamples may differ from what is described with regard to FIG. 5.

FIG. 6 illustrates an example physical architecture of a distributed RAN600, according to aspects of the present disclosure. A centralized corenetwork unit (C-CU) 602 may host core network functions. The C-CU may becentrally deployed. C-CU functionality may be offloaded (e.g., toadvanced wireless services (AWS)), in an effort to handle peak capacity.

A centralized RAN unit (C-RU) 604 may host one or more ANC functions.Optionally, the C-RU may host core network functions locally. The C-RUmay have distributed deployment. The C-RU may be closer to the networkedge.

A distributed unit (DU) 606 may host one or more TRPs. The DU may belocated at edges of the network with radio frequency (RF) functionality.

As indicated above, FIG. 6 is provided merely as an example. Otherexamples may differ from what is described with regard to FIG. 6.

FIG. 7 is a diagram illustrating an example 700 of code block reorderingfor retransmissions, in accordance with various aspects of the presentdisclosure.

As shown in FIG. 7, example 700 includes a receiver device 710 (e.g., aBS 110 or a UE 120) and a transmitter device 720 (e.g., a UE 120 or a BS110). Although some aspects are described and/or depicted herein interms of a UE transmitting to a BS, other configurations are possiblesuch as a BS transmitting to a UE, a UE transmitting to a UE, a BStransmitting to a BS, or any other type of transmitter devicetransmitting to any other type of receiver device. Moreover, althoughsome aspects are described in terms of a transmitter device and areceiver device, each of the transmitter device and the receiver devicemay transmit, receive, and/or perform any other wireless communicationfunction.

As further shown in FIG. 7, and by reference number 750, transmitterdevice 720 may transmit a HARQ communication using a first code blockorder. For example, transmitter device 720 may transmit a set of codeblocks of the HARQ communication in a first order and/or arrangementwith respect to time resources, frequency resources, and/or the like ofsymbols in a slot.

As further shown in FIG. 7, and by reference numbers 755 and 760,receiver device 710 may detect a trigger to reorder code blocks and mayprovide code block reordering feedback to transmitter device 720. Forexample, when receiver device 710 is a controller of communication withtransmitter device 720, receiver device 710 may detect a spur, athreshold level of periodic interference, a threshold edge effect, athreshold residual frequency error, and/or the like. Additionally, oralternatively, receiver device 710 may detect low signal quality withcode blocks of a particular symbol (e.g., low signal quality for codeblocks of a first symbol relative to code blocks of one or moresubsequent symbols, as described above). In some aspects, transmitterdevice 720 may detect a trigger to reorder code blocks based onreceiving the feedback. For example, transmitter device 720 may detect aspur based on feedback identifying the spur and may perform code blockreordering to mitigate the spur.

In some aspects, transmitter device 720 may receive a request to performcode block reordering. For example, when transmitter device 720 is acontroller of communication with receiver device 710, receiver device710 may detect a spur, a threshold level of periodic interference,and/or the like and may indicate to transmitter device 720 a requestthat transmitter device 720 is to reorder code blocks for aretransmission of the HARQ communication. In some aspects, receiverdevice 710 may transmit feedback information to transmitter device 720to enable transmitter device 720 to determine that an issue exists withtransmission (e.g., a spur exists).

In some aspects, receiver device 710 may transmit a recommendationregarding a reordering type for code block reordering (e.g., frequencybiased reordering or time biased reordering). Additionally, oralternatively, transmitter device 720 may use information, such asinformation relating to a cyclic redundancy check (CRC) bitmap todetermine a code block reordering type. In some aspects, transmitterdevice 720 may receive feedback, from the receiver device, that mayindicate a type of reordering to perform,

In some aspects, transmitter device 720 may reorder all of the codeblocks when performing code block reordering. For example, transmitterdevice 720 may ensure that each code block is at a different time and/orfrequency position in a retransmission of the HARQ communicationrelative to in the transmission of the HARQ communication. Additionally,or alternatively, transmitter device 720 may reorder a subset of codeblocks when performing code block reordering. For example, transmitterdevice 720 may change a time and/or frequency position of code blocks ina symbol that experiences interference from an aggressor transmitterdevice. In this case, transmitter device 720 may maintain the timeand/or frequency position of one or more other code blocks.

In some aspects, transmitter device 720 may reorder code blocks of theHARQ communication based at least in part on a reordering function. Forexample, transmitter device 720 may reorder the code blocks based atleast in part on an index of a retransmission of the HARQ communication,such that a transmission of the HARQ communication is performed with afirst code block order, a first retransmission is performed with asecond code block order, a third retransmission is performed with athird code block order, and/or the like. Additionally, or alternatively,transmitter device 720 may reorder code blocks based at least in part ona cell identifier of a cell in which transmitter device 720 isoperation. Additionally, or alternatively, transmitter device 720 mayreorder code blocks based at least in part on a device identifier (e.g.,a UE identifier of transmitter device 720 or receiver device 710, a BSidentifier of transmitter device 720 or receiver device 710, and/or thelike).

Additionally, or alternatively, transmitter device 720 may reorder codeblocks based at least in part on a randomization function. For example,transmitter device 720 may apply a pseudo-random permutation to thefirst code block order to determine a second code block order for aretransmission of the HARQ communication. Similarly, transmitter device720 may apply a cyclic shift in frequency, a time shift, and/or the liketo the first code block order to determine the second code block order.In some aspects, transmitter device 720 may apply a mirroring functionto determine the second code block order. For example, transmitterdevice 720 may mirror time locations of code blocks, such that codeblocks of a last symbol in the first code block order are in a firstsymbol of the second code block order.

In some aspects, transmitter device 720 may signal the second code blockorder. For example, transmitter device 720 may transmit a downlinkcontrol information (DCI) communication identifying the second codeblock order. In some aspects, transmitter device 720 may select from aset of possible code block orders or code block order reorderingfunctions (e.g., cell identifier-based reordering, UE identifier-basedreordering, retransmission index-based reordering, and/or the like) andsignal the selection. For example, transmitter device 720 may beconfigured with a plurality of possible code block orders and may setone or more bits in the DCI to indicate which code block order isselected. In this case, receiver device 710 may be configured withinformation identifying the plurality of possible code block orders andmay select the second code block order based at least in part on the oneor more bits in the DCI.

As further shown in FIG. 7, and by reference number 765, transmitterdevice 720 may retransmit the HARQ communication using the second codeblock order. For example, transmitter device 720 may retransmit the HARQcommunication to receiver device 710. In this case, by using the secondcode block order, transmitter device 720 may achieve an increasedaverage processing gain for the HARQ communication. Additionally, oralternatively, transmitter device 720 may transmit one or moresubsequent retransmissions of the HARQ communication (e.g., using athird code block, a fourth code block order, and/or the like) toreceiver device 710, thereby further increasing average processing gain.

In this way, transmitter device 720 improves HARQ feedback by reducing alikelihood of dropped communications. For example, transmitter device720 improves HARQ feedback in a single DMRS scenario where frequencyerror may occur. Additionally, or alternatively, transmitter device 720improves HARQ feedback in a multi-UE interference scenario where each UEhas the same allocation causing interference with each other UE.Additionally, or alternatively, transmitter device 720 improves HARQfeedback in low mobility scenarios, spur scenarios, slot ramp up or downscenarios, other types of scenarios, and/or the like, as described inmore detail above.

As indicated above, FIG. 7 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 7.

FIG. 8 is a diagram illustrating an example process 800 performed, forexample, by a transmitter device, in accordance with various aspects ofthe present disclosure. Example process 800 is an example where thetransmitter device (e.g., BS 110, UE 120, transmitter device 720, and/orthe like) performs operations associated with code block reordering forretransmissions.

As shown in FIG. 8, in some aspects, process 800 may includetransmitting a HARQ communication using a first code block order forcode blocks of the HARQ communication (block 810). For example, thetransmitter device (e.g., using controller/processor 240, transmitprocessor 220, TX MIMO processor 230, MOD 232, antenna 234,controller/processor 280, transmit processor 264, TX MIMO processor 266,MOD 254, antenna 252, and/or the like) may transmit a HARQ communicationusing a first code block order for code blocks of the HARQcommunication, as described above.

As further shown in FIG. 8, in some aspects, process 800 may includereceiving, from a receiver device, feedback to perform code blockreordering (block 820). For example, the transmitter device (e.g., usingantenna 234, DEMOD 232, MIMO detector 236, receive processor 238,controller/processor 240, transmit processor 220, TX MIMO processor 230,MOD 232, antenna 252, DEMOD 254, MIMO detector 256, receive processor258, controller/processor 280, transmit processor 264, TX MIMO processor266, MOD 254, and/or the like) may receive, from a receiver device,feedback to perform code block reordering, as described above.

As further shown in FIG. 8, in some aspects, process 800 may includedetermining to retransmit the HARQ communication based at least in parton the received feedback (block 830). For example, the transmitterdevice (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receiveprocessor 238, controller/processor 240, transmit processor 220, TX MIMOprocessor 230, MOD 232, antenna 252, DEMOD 254, MIMO detector 256,receive processor 258, controller/processor 280, transmit processor 264,TX MIMO processor 266, MOD 254, and/or the like) may determine toretransmit the HARQ communication based at least in part on the receivedfeedback, as described above.

As further shown in FIG. 8, in some aspects, process 800 may includereordering the code blocks of the HARQ communication based at least inpart on detecting the trigger to retransmit the HARQ communication(block 840). For example, the transmitter device (e.g., usingcontroller/processor 240, transmit processor 220, TX MIMO processor 230,MOD 232, antenna 234, controller/processor 280, transmit processor 264,TX MIMO processor 266, MOD 254, antenna 252, and/or the like) mayreorder the code blocks of the HARQ communication based at least in parton detecting the trigger to retransmit the HARQ communication, asdescribed above.

As further shown in FIG. 8, in some aspects, process 800 may includeretransmitting the HARQ communication using a second code block orderbased at least in part on reordering the code blocks of the HARQcommunication (block 850). For example, the transmitter device (e.g.,using controller/processor 240, transmit processor 220, TX MIMOprocessor 230, MOD 232, antenna 234, controller/processor 280, transmitprocessor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or thelike) may retransmit the HARQ communication using a second code blockorder based at least in part on reordering the code blocks of the HARQcommunication, as described above.

Process 800 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, a code block order of the HARQ communication is basedat least in part on a transmission index of the HARQ communication.

In a second aspect, alone or in combination with the first aspect,process 800 includes retransmitting the HARQ communication using a thirdcode block order after retransmitting the HARQ communication using thesecond code block order.

In a third aspect, alone or in combination with one or more of the firstand second aspects, process 800 includes transmitting at least onedownlink control information to indicate at least one code block orderfor the HARQ communication.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, a code block order of the HARQcommunication is based at least in part on a cell identifier or a useridentifier.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, reordering the code blocks includes applying atleast one of a pseudo-random permutation, a cyclic shift in frequency, atime shift, or a combination thereof.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, retransmitting the HARQ communication includesretransmitting the HARQ communication using a mirrored time resource ina slot relative to a time resource of a previous transmission of theHARQ communication.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, process 800 selecting a code blockreordering technique based at least in part on the received feedback.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, process 800 may include determining toperform code block reordering based at least in part on receivedfeedback from a receiver device.

Although FIG. 8 shows example blocks of process 800, in some aspects,process 800 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 8.Additionally, or alternatively, two or more of the blocks of process 800may be performed in parallel.

The foregoing disclosure provides illustration and description, but isnot intended to be exhaustive or to limit the aspects to the preciseform disclosed. Modifications and variations may be made in light of theabove disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construedas hardware, firmware, or a combination of hardware and software. Asused herein, a processor is implemented in hardware, firmware, or acombination of hardware and software.

Some aspects are described herein in connection with thresholds. As usedherein, satisfying a threshold may refer to a value being greater thanthe threshold, greater than or equal to the threshold, less than thethreshold, less than or equal to the threshold, equal to the threshold,not equal to the threshold, and/or the like.

It will be apparent that systems and/or methods described herein may beimplemented in different forms of hardware, firmware, or a combinationof hardware and software. The actual specialized control hardware orsoftware code used to implement these systems and/or methods is notlimiting of the aspects. Thus, the operation and behavior of the systemsand/or methods were described herein without reference to specificsoftware code—it being understood that software and hardware can bedesigned to implement the systems and/or methods based, at least inpart, on the description herein.

Even though particular combinations of features are recited in theclaims and/or disclosed in the specification, these combinations are notintended to limit the disclosure of various aspects. In fact, many ofthese features may be combined in ways not specifically recited in theclaims and/or disclosed in the specification. Although each dependentclaim listed below may directly depend on only one claim, the disclosureof various aspects includes each dependent claim in combination withevery other claim in the claim set. A phrase referring to “at least oneof” a list of items refers to any combination of those items, includingsingle members. As an example, “at least one of: a, b, or c” is intendedto cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combinationwith multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c,a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering ofa, b, and c).

No element, act, or instruction used herein should be construed ascritical or essential unless explicitly described as such. Also, as usedherein, the articles “a” and “an” are intended to include one or moreitems, and may be used interchangeably with “one or more.” Furthermore,as used herein, the terms “set” and “group” are intended to include oneor more items (e.g., related items, unrelated items, a combination ofrelated and unrelated items, and/or the like), and may be usedinterchangeably with “one or more.” Where only one item is intended, thephrase “only one” or similar language is used. Also, as used herein, theterms “has,” “have,” “having,” and/or the like are intended to beopen-ended terms. Further, the phrase “based on” is intended to mean“based, at least in part, on” unless explicitly stated otherwise.

What is claimed is:
 1. A method of wireless communication performed by atransmitter device, comprising: transmitting a hybrid automatic repeatrequest (HARQ) communication using a first code block order for codeblocks of the HARQ communication; receiving, from a receiver device,feedback to perform code block reordering; determining to retransmit theHARQ communication based at least in part on the received feedback;reordering the code blocks of the HARQ communication based at least inpart on detecting the trigger to retransmit the HARQ communication; andretransmitting the HARQ communication using a second code block orderbased at least in part on reordering the code blocks of the HARQcommunication.
 2. The method of claim 1, wherein a code block order ofthe HARQ communication is based at least in part on a transmission indexof the HARQ communication.
 3. The method of claim 1, further comprising:retransmitting the HARQ communication using a third code block orderafter retransmitting the HARQ communication using the second code blockorder.
 4. The method of claim 1, further comprising: transmitting atleast one downlink control information to indicate at least one codeblock order for the HARQ communication.
 5. The method of claim 1,wherein a code block order of the HARQ communication is based at leastin part on a cell identifier or a user identifier.
 6. The method ofclaim 1, wherein reordering the code blocks comprises: applying at leastone of: a pseudo-random permutation, a cyclic shift in frequency, a timeshift, or a combination thereof.
 7. The method of claim 6, furthercomprising: selecting a code block reordering technique based at leastin part on the received feedback.
 8. The method of claim 1, whereinretransmitting the HARQ communication comprises: retransmitting the HARQcommunication using a mirrored time resource in a slot relative to atime resource of a previous transmission of the HARQ communication.
 9. Atransmitter device for wireless communication, comprising: a memory; andone or more processors operatively coupled to the memory, the memory andthe one or more processors configured to: transmit a hybrid automaticrepeat request (HARQ) communication using a first code block order forcode blocks of the HARQ communication; receive, from a receiver device,feedback to perform code block reordering; determine to retransmit theHARQ communication based at least in part on the received feedback;reorder the code blocks of the HARQ communication based at least in parton detecting the trigger to retransmit the HARQ communication; andretransmit the HARQ communication using a second code block order basedat least in part on reordering the code blocks of the HARQcommunication.
 10. The transmitter device of claim 9, wherein a codeblock order of the HARQ communication is based at least in part on atransmission index of the HARQ communication.
 11. The transmitter deviceof claim 9, wherein the one or more processors are further configuredto: retransmit the HARQ communication using a third code block orderafter retransmitting the HARQ communication using the second code blockorder.
 12. The transmitter device of claim 9, wherein the one or moreprocessors are further configured to: transmit at least one downlinkcontrol information to indicate at least one code block order for theHARQ communication.
 13. The transmitter device of claim 9, wherein acode block order of the HARQ communication is based at least in part ona cell identifier or a user identifier.
 14. The transmitter device ofclaim 9, wherein the one or more processors, when reordering the codeblocks, are to: apply at least one of: a pseudo-random permutation, acyclic shift in frequency, a time shift, or a combination thereof. 15.The transmitter device of claim 14, wherein the one or more processorsare further configured to: select a code block reordering techniquebased at least in part on the received feedback.
 16. The transmitterdevice of claim 9, wherein retransmitting the HARQ communicationcomprises: retransmit the HARQ communication using a mirrored timeresource in a slot relative to a time resource of a previoustransmission of the HARQ communication.
 17. A non-transitorycomputer-readable medium storing one or more instructions for wirelesscommunication, the one or more instructions comprising: one or moreinstructions that, when executed by one or more processors of atransmitter device, cause the one or more processors to: transmit ahybrid automatic repeat request (HARQ) communication using a first codeblock order for code blocks of the HARQ communication; receive, from areceiver device, feedback to perform code block reordering; determine toretransmit the HARQ communication based at least in part on the receivedfeedback; reorder the code blocks of the HARQ communication based atleast in part on detecting the trigger to retransmit the HARQcommunication; and retransmit the HARQ communication using a second codeblock order based at least in part on reordering the code blocks of theHARQ communication.
 18. The non-transitory computer-readable medium ofclaim 17, wherein a code block order of the HARQ communication is basedat least in part on a transmission index of the HARQ communication. 19.The non-transitory computer-readable medium of claim 17, wherein the oneor more instructions, when executed by the one or more processors,further cause the one or more processors to: retransmit the HARQcommunication using a third code block order after retransmitting theHARQ communication using the second code block order.
 20. Thenon-transitory computer-readable medium of claim 17, wherein the one ormore instructions, when executed by the one or more processors, furthercause the one or more processors to: transmit at least one downlinkcontrol information to indicate at least one code block order for theHARQ communication.
 21. The non-transitory computer-readable medium ofclaim 17, wherein a code block order of the HARQ communication is basedat least in part on a cell identifier or a user identifier.
 22. Thenon-transitory computer-readable medium of claim 17, wherein the one ormore instructions, that cause the one or more processors to reorderingthe code blocks, cause the one or more processors to: apply at least oneof: a pseudo-random permutation, a cyclic shift in frequency, a timeshift, or a combination thereof.
 23. The non-transitorycomputer-readable medium of claim 22, wherein the one or moreinstructions, when executed by the one or more processors, further causethe one or more processors to: select a code block reordering techniquebased at least in part on the received feedback.
 24. The non-transitorycomputer-readable medium of claim 17, wherein retransmitting the HARQcommunication comprises: retransmit the HARQ communication using amirrored time resource in a slot relative to a time resource of aprevious transmission of the HARQ communication.
 25. An apparatus forwireless communication, comprising: means for transmitting a hybridautomatic repeat request (HARQ) communication using a first code blockorder for code blocks of the HARQ communication; means for receiving,from a receiver device, feedback to perform code block reordering; meansfor determining to retransmit the HARQ communication based at least inpart on the received feedback; means for reordering the code blocks ofthe HARQ communication based at least in part on detecting the triggerto retransmit the HARQ communication; and means for retransmitting theHARQ communication using a second code block order based at least inpart on reordering the code blocks of the HARQ communication.
 26. Theapparatus of claim 25, wherein a code block order of the HARQcommunication is based at least in part on a transmission index of theHARQ communication.
 27. The apparatus of claim 25, further comprising:means for retransmitting the HARQ communication using a third code blockorder after retransmitting the HARQ communication using the second codeblock order.
 28. The apparatus of claim 25, further comprising: meansfor transmitting at least one downlink control information to indicateat least one code block order for the HARQ communication.
 29. Theapparatus of claim 25, wherein a code block order of the HARQcommunication is based at least in part on a cell identifier or a useridentifier.
 30. The apparatus of claim 25, wherein the means forreordering the code blocks comprises: means for applying at least oneof: a pseudo-random permutation, a cyclic shift in frequency, a timeshift, or a combination thereof.